If you are not smart enough to install non-market Android apps, you have no problem.

If you are smart enough to install non-market Android apps, you know what you are getting into.

With great power comes great responsibility. I think these pieces keep surfacing because the Anti-Virus companies desperately need to get into this market. They see it is the future and they want a piece of it.

Technically, not a problem for Android users who stay in Google's walled garden either. Now, we can debate the merits of walled gardens but the article itself is just trying to gin up business for McAfee and citing running unknown sources as evidence of some malware problem when the issue is the user, not the system, since that is off by default.